LLMs are the first step in the movement away from the "early days" of computing where you needed to learn the logic based language and interface of computers to interact with them.
That is where the inevitabilism comes from. No one* wants to learn how to use a computer, they want it to be another entity that they can just talk to.
*I'm rounding off the <5% who deeply love computers.
No one wants to communicate with a computer. Computers are annoying, vile things. They just want things to work easily and magically.
Therefore, for these people, being able to communicate in a natural language isn’t going to be anymore appealing than a nice graphical user interface. Using a search engine to find stuff you want already requires no logic, the LLM does the same but it just gives you better results.
Thus the world of LLMs is going to look much like the world of today: just with lazier people who want to do even less thinking than they do now.
It is inevitable.